Channel-opening device for fastening-inserting machines



F. L. M AcKENZlE. CHANNEL OPENING DEVICE FOR FASTENINGINSERTING-MACHINES.

APPLICATION FILED OCT I3, 1917- 1,375,795; mmm Apr. 26,; 1921.,

Y 2 SHEETS-SHEET l. I Q .36 Fi .1.

1o 40* v 54 /4L la Z5 F. L. MACKENZIE. l CHANNEL OPENING DEVICE FORFASTENING INSERTING MACHINES.

APPLICATION FILED OCT 13, 1917.

Patentedgjpr. 269 M211.,

2 SHEETS-SHEET 2.

, nv JERSEY,

cnannnL-ornnrne nnvrcn ron ras'rnnrNe-rnsnerrne Meer-rines.

Application filed October 13, 1917.

To all whom t 72mg/ concer/it.'

Re it known that l, Fnac L. MACKENZIE, a citizen of nie United States,residing at Beverly, the county of Essex and State of Massachusetts,have invented certain lmprovements in Channel-@peiling levices forllastelling-inserting hlachines, of which the fcllowing ccscription, inconnection with the accompanying drawings, is a specii'ication, likereference characters on the drawings indicatinglike parts in the severalgure's.

rlhs invention relates to devices for opening a channel in the worlr inadvance of mechanism arranged to operate on the hottoni of the channeland more particularly to a channel opening device constructed andarranged to expose the bottom of channel formed in a. shoe sole to theoperation of mechanism for inserting metallic fastenings therein tomalre a seam in the sole. rlhe invention is herein illustrated asembodied in a machine for inserting` fastenings of the type shown anddescribed in United States Letters Patent No. 1,030,775, granted Juneze. 12H2, on an ation of George Goddn.

ln the operation of machines of the type shown in the patent above citedin nailing in a nel, an awl is forced downwardly into the channel toform an openingto receive the fastening, and is then moved transverselyof its worlr penetrating,` movement to the work lts feedingmovementbeing completed, the awl is withdrawn from the work, andV a fasteningdelivered into opening formed by the awl and driven into the work. n themeantime, the iin forced into the work, and the rations ahove set forthare then repeated to nialre a of metallic fastenings in the im of thechannel.

icnlty has been experienced in the opn snch machines, for example, byreason of the entrance of the awl in the channel not being effectedreadily and properly and hy reason of the breaking down of the channelip hy the awl.

lt has previously been proposed to prov v means i opening the channel inadvance of the entrance of the awl in the channel. lint the operation ofsuch devices has not heen entirely satisfactory. ln the opera 'on ofprior constructions on portions of the worl; in which the distancebetween the edA of the worl; and the inner edge of the Specification ofLetters Patent.

Patented Apr. 26, Serial No. 196,358.

channel is greater than normal, the inner edge of the channel mayA bedrawn away from the part of the channel opening means which directlyengages the channel or the channel engaging part may he otherwiseoisplaced relatively to the channel to an extent such that its effectiveoperation is prevented. liloreover, the channel opening` means ofcertain of such devices is liable to he forced against the inner edge ofthe channel particularly in operating around a curved part of a. shoesole such as the toe, in such manner as to mutilate the channel lip orother portion of the sole adjacent to the channel.

@ne of the objects of the present invention is to provide channelopening` means so constructed that the above-mentioned and otherdi'lliculties may be oloviated.

ln accordance with an important feature ofthe invention. means areprovided in combination with the fastening' inserting` instrumentalitiesor other mechanism for operating on the bottom of a channel iforined inthe worl being operated upon, constructed and arranged to lie in andtnrn hach the lip of the channel in advance of the operation of theoperating means and movable by the work in a direction parallel to theplane the work and transverse to the plane of operation of the opentingmeans. @peralive ennafrement of the channel opening means wit- 1 theinner edge of the channel is thus insured rergardless of thedisplacement of the inner e( of the channel relatively to the plane oroperation of the operating resulting` from-movement of the work Vmchange in the distance between the of the work and the inner edge of thechannel.

The )art of the channel opening; means which directly engages 4the clannel, in addition. to the movement ahovc mentioned, is also capable ofbeingmoved hy the worl.T in a direction `transverse to the plane of 'thework and parallel to the plane of operation of the operating means or ina direction compounded of the above-mentioned directions of movement.The channel opening' means is therehvcaused to maintain properengagement with the channel in any position of the work andindependently of the shape of the work or of the character of thechannel formed therein,

ln the preferred embodiment of the invention, the channel opening meansis mounted loosely on a stationary support so as to bear a constantrelation to the point of operation of the operating* means on the bottomof the channel to the end `that the channel engaging jart of the channelopening means may engage the channel lip closely adjacent to the pointat which the awl or other operating means operates on the bottom of thechanneh and is movable to accommodate itself to the requirements of thework being' operated upon.

.Certain of the mechanical features of the preferred embodiment of theinvention may be substituted for by equivalent mechanism withoutdepartingfrom the essentials of the invention. A modification of theinvention possessing` important advantages of the preferred embodimentthereof will be hereinafter described.

Although tie invention is hereinafter described as embodied in fasteninginserting machines of the type shown in the patent to Goddu above cited,it is recognized that the applicability of the invention is not limitedthereto.

Other objects and novel features of the invention will appear as Vthedescription proceeds.

In 4the drawings:

Figure l is a front elevation of the head of a machine of the typedisclosed in the patent above cited, showing` the preferred embodimentof the present invention applied thereto;

Fig. 2 is a plan view of the channel opening` device of this inventionmounted on the 'juard plate of the machine;

Fig. 3 is a view in elevation lookingfrom the right of Figi'. 2;

Fin. el is a view in cross-section on the line l-4 of Fig'. 2, lookingin the direction of the arrow, and showing` further a cross-section ofthe work;

Fig. 5 is a view in cross-section on line 5-5 of Fig. 2, looking in thedirection of the arrow;

Fin'. 6 is a view in perspective of the channel openinglingerg Fig'. 7,shows in front elevation parts mounted in the head of the machine andillustrates a modification of the invention;

Fin'. 8 is a plan view of the modification shown in Fig. 7

Fing, 9 is a view in elevation lookingfrom the right in Fig. 8 andshowingr the awl bar carrier in cross secztiom and Fig. l0 is a crosssection on line lO-lO of Fin'. 8 looking in the direction of the arrow.

The illustrated machine has a supportingr frame including a standard orcolumn 2 and a head t. In the column 2 is mounted the work support orhorn 6, (see Fin: 4) the machine being provided with suitable mechanismfor operating' the worlr support loetween work receiving and worlrclamping positions and for automatically depressing the worlr supportperiodically during the operation of the machine to release the workfeeding movements, which mechanism may conveniently be as shown andfully described in said Letters Patent. Y

ln the machine head d are mounted the various parts of the`'fasteninginserting mechanism and the cams which control the timing ofthe operations of the various parts of the machine as a whole.

The fastening` inserting; or fastening driving mechanism comprises adriver 'bar 8 mounted to reciprocate vertically in a {guideway in anuprightpart of the machine head and having clamped to its lower end adriver lO. The driver l0 reciprocates in a driver passage in a fixeddriver guide 12. Upon its rear side the driver bar 8 is provided withrack teeth engaged bythe teeth of a segment rack carried upon a camoperated lever (not shown).

The fastenings to be driven are container.1 in a hopper. (not shown)from which they are conducted by a raceway l-ito a point adjacent to thedriver passage in the driver guide' l2, said guide being broken away atthe `side adjacent to the raceway wherebj7 the fasteninns may beintroduced one at a time from the raceway into said driver passage.

Below the driver guide l2 i: a fastening` receiving' throat .l5 mountedupon a throat carrier or slide 1S and movable with said slidetransversely 'to the path of feed of the work and transversely to theraceway l-i. Transverse movement of the throat lo is provided for thepurpose of withdrawlne1 the throat from the path of shoe feed movementof the aw] 20, hereinafter further referred to in order to permit theawl to bring' the fastening` receiving opening which it has formed inthe worlr beneath the driver passage in the throat 16. The throatcarrier or slide 18 is Lguided in an opening in the machine frame and isprovided at its rear end with rect: teeth with which engage teeth upon asegment rack on the lower end of a cam operated throat slide actuatinglever pivoted on the machine head. all as fully shown and described insaid Letters Patent.

J-r fastener separator 22 is also mounted upon the throat carrier orslide i8 for operative movement therewith, the separator 22 being'yieldiugly connected to said slide so that on return movement of theslide the separator may move relatively to the slide in the event thatit meets an obstruction in the raceway.

The awl 2O is clamped in a two-part awl bar. the lower part 24 of theawl har, which partreceives the awl7 having an adjustable toothedconnection 26 with the upper awl part 2S is carried y arianged to slidestationery ,orucnet on the machine l vil b airler 30 along i moves theevers/ely ot the line of '.iastening the line el shoe leed etleet shoereeding movement. ilhis t the aivl bar 2d, eeted by a floating lever atits upper end with a cam nun groove in the rear mounted upon thedfrivii'ig` shaft 38. bar ze, L6 is arranged to reciproly in its carrierto form suei receiving' opel ings in the Work. movements of ded on itsrear neo teeth Ll0 upon a segment rack unen one arm of a cam operated v1operatingv lever (not shown).

Ao parts above deseiibed conveniently muy and as shown substantiallylike e'om-espending` pei-ts of the machine of e ove mentioned LettersPatent in conoperation und reference o Said llettei's Patent for adesei'igtion et the construcot these parts. 'Sie is h rein illustrated(see a shoe havingj the B5 the upper` C, in-

'l the machine lnunmarized as been mounted horn 6 in the 6, the horn isie work supper shouf'n) to press ement with a Work abut- ;e erally utd2, the horn into Work clamping position position dete'nined by the A'ter the muehine e. the awl 2O is tirst moved mechanism to I ,3* in thetn oug'h sliding' 30, to feed :7l the fastening ne nivl has just o if,brought into the line i h the 7. the throat 16 Q2 b withdrawnsimultaneously durinj the Werl; feeding` movenient vil iieby trie throetl@ is moved out t le path et' tne avl fis the awl 2O to its initialposition utter the Work goperationa the throat 16 and sepa- ;ire movedforwardly into their i, positionsj the throat 16 thereby bel "ht intooperative position with and the separutor acting to deliver a. fasteningto Ythe throat 16 as the fasing receiving` opening` in the throat m vesbeneath the driver passage and as the ver completes its upward movement.'l`herealtei, the driver bar 8 is actuated by @um to elect a drivingstroke of the l0 to inseit the fastening which has een delivered intothe throat into the receiving` opening'4 just formed in ,vorl. theic.sten-lngeelng clenched 1n svorl by impact against the horn tip.

he abutment Ll2 is carried by the eX- i 43 of the guard plate Ll asshoivn ele fly in .7. rhe guard plate lts lo the heads ot which arecounterinto the lower surface of the guard /L Work.

The gage member il?) is secured 'to the guard plate @l by bolts whichlie Within recesses indicated at 52 formed in the upper surface of the`guard plate and ei;- tending only partially through the guard plate,The bolts 50 pass through openings formed in the bottoms of tie recesses52 and through slots (not shown) in the gage membei: #ld rEhe boltsI 50pass also through openings in a plate 54; which underlies the member 48und isheld in trictional engagement therewith by the nuts on the bolts50 and by which the gage member d8 is frietionally held in any positionoliadjustment to Whieh it may be moved by the mea-:is new to bedescribed. is illustrated,

a rack 58 is provided on the membei'- fi-S and meshes with a pinion 60on the shfzit which is journaled in the guard plate 44, as shown moetclearly in Fig. 2. rlhe shaft S2 is provided with a handle 64 ttormanipulation by the operator to eleet the adjustment oi the gage. Themeans above described for supporting and adjusting the gage member formsno part of the passage therein in line with present invention and anyother supporting and adjusting means can be substituted therefor withoutdeparting from the essentials of the invention. In some of its aspectsthe invention is independent of the provision of any gage member orother work positioning means.

' Y Novel means are provided for opening up the channel in advance ofthe fastening inserting instrumentalities to insure the proper operationof such instrumentalities in making a seam of metallic fastenings in thebottom of the channel. In the illustrated construction, such meanscomprises a channel opening finger 66 mounted on the guard plate 44, theplow-shaped end 68 of which normally occupies a predetermined positionwith relation to the plane defined by the driver 10 and awl 2O or, inother words, and as sometimes referred to hereinafter, the plane ofoperation of the fasteninginserting instrumentalities.

The gage member 48 is so positioned relatively to the plane of operationof the fastening inserting instrumentalities that when a portion of thepiece of work being operated upon, at which the edge of the work is atthe minimiun distance from the inner edge of the channel formed in thework, is in operative relation with the gage and the fastening insertinginstrumentalities, the gage will so position the work that the inneredge of the channel will be located close to the plane of operation ofthe fastening inserting instrumentalities upon the work and thefastenings will be inserted in the channel of the work closely adjacentto the inner edge of the channel as indicated at 70 in Fig. 4 ofthedrawings. The plow-shaped end 68 of the channel opening finger 66 ispositioned operatively to engage the channel of the work when the workis held in operative relation with the gage member 48 and the fasteninginserting instrumentalities. l/Vhen a portion of the work at which thedistance between the edge of the work and the inner edge of the channelis greater than the minimum distance is presented to the gage member 48,the inner edge of the channel will be spaced farther away from the gagemember 48 and from the plane of optration of the fastening insertinginstrumentalities than when the inner edge of the channel is spaced atthe minimum distance from the edge of the work. The distance from theedge of the work to the inner edge .of the channel varies to a greateror less eX- tent and it will be understood from'the foregoing that ifthe channel opening finger `66 was stationarily mounted, the inner edgesfinger, and effective operation of the finger in lifting or turning orlaying back the lip of the channel out of the way of the fasteninginserting instrumentalities would he prevented.

1n order to cause the channel opening finger to be maintained invariablyin operative relation to the lip of the channel so as to open thechannel properly for operation of the fastening insertinginstrumentalities, means are provided for yieldingly urging the channelopening finger 66 in a direction transverse to theplane of operation ofthe fastening inserting instrumentalities and toward the inner edge ofthe channel. 1n the illustrated construction, the finger 66 is mountedon the carrier 7l which slides in a groove 72 formed in a bracket 7 4adjustably secured to the guard plate 44 by bolts 76 threaded into theguard late 44 and passing through elongated slots 8 formed in thedepending flange 80 of the bracket 74. The fiange 8O is cut out at 8l soas to permit movement of the bracket 7 4 relatively to the shaft 62. Theforce by which the channel opening finger 66 is normally urged forwardlyin the direction of the inner edge of the channel formed in the work isexerted by aspring 82 seated within the bore 84 of Y the carrier andabutting Yagainst the shoulder 86 of the set screw 88 which is threadedin the rear end of the bracket 74 and held in adjusted position thereinby a lock nut 90. The set screw 88 forms a convenient means foradjusting the tension of the spring 82 and consequently the force withwhich the thin or delicate work, the edge of the plowshaped end of thechannel opening linger might becaused to cut or tear the lip of thechannel or otherwise injure the work. By the means above described,however, the operator is enabled to readily adjust the force exerted onthe channel opening finger to the character of the work being operatedupon.

When no work is presented to the machine the plow-shaped end 68 of thechannel opening device is projected beyond the plane of operation of thefastening inserting instrumentalities and to a distance from the workengaging surface of the gage member 48 greater than the distance betweenthe edge of the work and the inner edge of the channel formed thereinand is maintained in such position in opposition to the force exerted bythe spring 82 by a set screw 92 threaded in the carrier 71 and passingthrough an elongated slot 94 formed in the bracket 74. The arrangementof the set screw 92 and slot is such that when the work is presented inoperative relation to the gage L148, the channel openingD C Oer willnormally he pushed hach to a position such that the set screw 92 willoccu y suhstan ially the iniddle portion the slot 94 in consequence et wch the cl annel opening iinger will he permitted during operation onpiece of move in either direction from its position to aoco unodateitselt to ion of the fastening' inserting instrumentalities resulting'Atrom movement or" work or a change in the distance 1oetween the edee otthe worli and the inner edge of the channel.

ln order `lurthe..` to permit the channel opening inger to accommodateitseltA to the wor-lr so that it will be retained in the channel o? thewor? and open the channel prop-` erly in advance of the operation oitthe astening inserting; instrninentalitles) the plow-shaped 'er is perniin e et the end channel opening` ltted to move toward and from directiontransverse to tthe work or, in othewords, in a cllel to vthe plane otoperation ag insegting` instrumentalities, the mechanism which the \t tmurises we: s*

y l 'l y shown in 6 ot the drawings the channel opening linger G6comprises l cli; lia/ing hrttrcatcd por-- ino' ,-orm d therein onreceive the ends of the channel oper' iorins an eXtension of the o 1 areprovided for yieleingrly holding ned end ot' the finger t into thechannel o?? the work, is uch means comprises a spring 110 ned about thestud shaft 9e 'and having" C end thereof ei e a nin 112 on the .u s, c y

. eli-.1 engaging a pin and the( in order th plow-shan o? the dunnel nin to the t ed end 6* -1 is held d C) CO 1ct-er L.

t Si '"t (t. n amusant@ his the

angular adjustment to which it may be moved.

The movement ot the linger 66 in a direction transversely ot the planeof the work is preferably such as to permit the operative end of tielinger to'movo downwardly relatively to the gage member 118 and thefasteni g inserting instrumentalities a sufficient distance to adaptitself to all the requirements ot the work, for example the linger willhe moved downwardly when operating` on the shank portion of a shoe sole.1t is desirahle however7 that the range of downward movement of theoperative end ot the finger loe only such as is necessary to permit theend of the finger 'to follow the channel in all parts of the worlf sinceit is necessary in starting` an operation on a piece of worl to hrstengage the channel of the work with the plow-shaped end of the channelopening and then to raise the work into operative relation with thefastening inserting instrumentalities against the tension of the spring110. rllhe extent of upward movement required to loe imparted to thework to bring it into operative position should loe as little aspossible, consistent with the proper operation of the linger, to savetime and effort on the part of the operator. Means are thereforeprovided for limitingT the ef:- tent of downward movement ot the inger,which means as shown, comprises a set screw 118 passing through anopening 'loi-med in a split portion of the block 100., there beingfurther a screw 120 passing through the split portion of the block 100and operating to clamp the parts ot said portion upon the set screw 118.

lnorder to adapt the channel opening device of this invention to therequirements ot different kinds of work and to prolong the lite ot thechannel opening; device by permitting the substitution oi a new Channelopening finger when the finger is worn or otherwise rendered unfit toruse, the hi iurcated portion 102 ot the block 100 has termed therein 'asocket 122 to receive the reduced portion 12a of the finger 66. A setscrew 1Q@ operates to retain the reduced portion 121i of the linger 66in the socket rllhe effectiveness ot' the operation ot' the channelopening` finger is increased hy posi-v tioning the plow-shaped end 68oit the *Finger closely adjacent to the path ot movement ot the awl 20.1n order that no hrealraae may result it the channel opening accierallyat 128, is secured to the awl bar carrier 30, by a block 132 having aserrated surface formed thereon adapted to engage with a serratedsurface formed on a depending part 134 of the awl bar carrier 30. Theblock 132 of the channel opening device is adjustably connected to theawl bar carrier 30 by a bolt 136 threaded into the depending part 134 ofthe awl carrier bar 30 and passing through an elongated slot (not shown)in the block 132.

The operative parts of the channel opening device are supported by a bar138 care ried by the block 132 and bored out to receive a stud shaft 140rotatably mounted in the bore of the bar 138 and maintained in anyposition of angular adjustment relatively to said bar to which it may bemoved, by the set screw 142 threaded into an opening in the bar.

The channel opening finger 144 has a plow-shaped part 146 extendinglaterally therefrom and constructed and arranged to lie within thechannel formed in the work and to turn back the channel so as to exposethe bottom of the channel for operation of the fastening insertinginstrumentalities hereinbefore described.

The channel opening finger 144 is formed with a reduced shank portionjournaled in an' enlarged portion 148 of a carrier 150 which, in turn,is rotatably mounted on the stud shaft 140.

It will be seen from the foregoing that the plow-shaped end 146 of thechannel opening finger 144 is mounted for movement in either of two'directions. The fulcruming of the carrier 150 on the stud shaft 140 pernmits movement of the finger in adirection transverse to the plane of thework, whereas the fulcruming of the shank of the finger 144 in theenlarged portion 148 of the carrier permits movement of the -channelengaging portion 146 of the finger in a direction pan allel to the planeof the Work. n

In order to hold the channel engaging portion 146 of the finger 144 downupon the work a spring 152 is coiled about the stud shaft 140 and isconnected at one of its ends to the pin 154 provided in an extension 156of the stud shaft 140 and at its other end toa pin 158 formed in a part160 rigidly connected to the reduced shank portion of the finger'144 bya nut 162. The member 160 normally engages the carrier at 164 see Fig.10) and the spring 152 operates throughthe member 160 to hold thechannel engaging portion 146 of the finger 144 downward upon the work.Vrihe carrier 150 hasA formed thereon the ears 166 and 168 journaledloosely on the stud shaft 140. Threaded into an extension 170 of thecarrier 150 is an ad-l justable set screw 172 locked in adjustedposition in the extension 170 of the carrier by a lock nut 174 andengaging an extension 176 formed on the bar 138. The set screw 172operates adjustably to limit the extent of the downward movement of thefinger 144.

The mechanismv hereinbefore described holds the channel engaging portion146 of the channel opening finger against the inner edge of the channelin the work, the spring 152 yielding, however, t'o permit the member 160to be moved away from Ythe carrier 150 upon movement of the channelengaging portion 146 of the finger toward the workengaging surface ofthe gage member 48. The engagement of the member 166 with the carrierserves to limit the movement of the finger 144 in a direction away fromthe gage member.

As heretofore explained, the plane of operation of the fasteninginserting instrumentalities previously referred to herein is that denedby the awl and driver. In one of the appended claims, the fasteninginserting instrumentalities are broadly defined as means for operatingon the vbottom of the channel formed in the worlr. is applied to aconstruction in which the means for operating on the bottom of thechannel does not embody an awl and a driver, the reference in certain'ofthe claims to the plane of operation of said operating means relates toa plane bearing a like relation to the work and the other parts of theVmachine as that of the piane defined by the awl and driver in themachine in which the invention is herein illustrated as embodied.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent of the United iszmeans for operating onthe bottom of a channel formed in the work, means for positioning thework reiativeiy to said means having a surface to engage' the edge ofthe work, said surface being spaced from theV piane of operation of saidmeans on the work by a distance substantially equaltfo the minimumdistance between the edge of the work and the inner edge ofthe channel,a channel opening device having its operati e end spaced from the workengaging surface of the work positioning means, and means for urgingsaid device yieidingly in a direction transiferse to the plane ofoperation of said operating means to 'cause said device to be maintainedin contact with the inner edge or the channel when the distance betweenthe edge of the work and the inner edge of the channel is greater thanthe minimum distance between them in that piece of worlr.

2. in a machine of the classdescribed, means for operating on the bottomof a channel formed inthe ,vorlr, means for posif tioning theworkrrelatively to said means having a surface to engage the edge of thework and beingv adjustable for Ydifferent 1. 1n a machine of the classdescribed,

pieces oi' work to space said surface from. the plane of operation otsaid means on the ivork by a distance substantially equal to the minimumdistance between the edge of the Worlr and the inner edge of thechannel, a channel opening device having its operative end spaced fromthe ivorlr engaging surface of the worlr positioning mea s, means forurging said device yielding a direction transverse to the plane et tionof said operating means to cai l levice to be maintained in contact withhe inner ec ge of the channel when the distance between the edge of theWerl; and the inner edge of the channel is greater than the minimumdistance between them in that piece of Worlr- 3. ln machine of the classdescribed, means Jfor operating on the bottom of a channel formed in theivorlr, means 'for positioning the ivorlr relatively to said meanshaving a surface toengage the edge of the Work, said surface beingspaced rom the plane of operation oit said operating means on the Werl;a distance substantially equal to the minimum distance between the edgeof the ivorlr and the inner edge of the channel, a channel openingdevice having its operative end spaced Jfron the Work engaging surfaceot the Work positioning means,

cans for urging said device yieldingly in a direction transverse to theplane o' operation of said operating means to cause said device to bemaintained in rontict With the inner edge ot the channel when thedistance between the edge of the Work and the inner edge oi' the channelis greater than the minimum distance between them in that piece of Work,and means for adjusting the channel opening device relatively to theivorlr posi tioning means.

4;. ln machine of the class described,

means for operating on the bottom of a.

channel formed in the Work, a device for openingthe channel in advanceoic the operation of said means, mean-s for positioning the operativeend ot said device beyond the plane oi' operation oi"- said means on thevvorl, and means for maintaining said device normally in such positionconstructed and arranged to permit movement of said device bymanipulation of the v" l; having the channel thereoil engaged with saiddevice to a position substantially the plane oj operation of saidoperating means.

ln a machine ot the class described, means for operating on the bottomof a channel formed in the Work, work-positionmeans engaging the edge'oithe Work, a movable channel opening ringer having its operative endnormally spaced from the ing surface a distance greater than the normaldistance between the edge oi the ivorlr and the inner edge of thechannel formed therein so that the presentation tion opposite to that inwhich it is moved v by the Worli to permit the to be move-d in onedirection to maintain contact oi the Work with the work positioningmeans When a portion O the Work, at which the distance between the edgeof the work and the inner edge orn the channel is less than the normaldistance, is b' ing operated upon by said operating means, and' to causethe finger to be movedin an opposite direction when a portion of thework, at which the distance between the edge of the Work and the inneredge of the channel is greater than the normal distance, is in operativerelation to said operating means.

6.k ln a machine of the class described, means for operating on thebottom of a channel formed in the Work, and means constructed andarranged to lie in and turn back the lip of the channel to expose thebottom of the channel in advance of the operation oisaid means, andbeing movable by manipulation of the Work in a direction transverse tothe plane of operation or' said operating means.

T. ln a machine of the class described, means for operating on thebottom of a channel formed in the Work, a stationary support, and achannel-opening device mounted loosely on the support for move ment bymanipulation of the ivorlr or to accommodate itself to the character ofthe channel formed therein.

8. ln a machine oic the class described, means for operating on thebottom of a channel formed in the ivorlr, a stationary support, achannel-opening device mounted loosely on the support, and means forurging said device yieldingly in a direction transverse to the plane otoperation ot said operating means,

9. ln a machine of the class described, means for operating on thebottom of a channel formed in the ivorlr, an abutment disposed forengagement With the channelec sur'l'ace or" the Worlr, a stationarysupport, and a channel-opening device mounted loosely on the support formovement of its operative end relatively to said abutment in a planeansverse to the channeled surface oit Vthe Worlr and substantiallyparallel to the plane of operation ot said operating means,l and forprojection of said operative end to a point below .the level. at whichthe Work is finally positioned for the operation of said operatingmeans.

l0. ln a machine of the class described, means for operating `on thebottom of a channel formed in the vvorlr, an abutment disposed lforengagement with the channeled surface of the Work, a stationary support,

a channel-opening` device mounted on the support ior movement relativelyto the abutment in a direction substantially parallel to the plane ofoperation of said operating means, and means for pressing said deviceagainst the Work, construct d to yield during the functioning of thedevice to open the channel, thus permitting movement of the device withrelation to the abutment to accommodate itself to the coniiguration orPthe Work.

11. 1n a machine of the class described, means for operating on thebottom ot a channel formed in the Work, a channel opening deviceconstructed and arranged to turn back the lip of the channel in advanceot the operation of said operating means, means :tor urging;` saiddevice yieldingly in a direction transverse to the plane oi' operationof said operating means, and means for regulating the force exerted bysaid yielding,` means. Y

12. ln a machine of the class described, means for operating' on thebottom of a channel formed in the Work, a stationary support, a.channel-opening device mounted loosely on the support for movement in adirection transverse to the plane ot operation of said operating moans,and means tor limiting the extent of movement oi said device.

13. ln a machine ot the class described, means for operating on thebottom ot a channel termed in the work, a stationary support, achannel-opening device mounted loosely on the support, controlling meansfor said device constructed and arranged to permit the device to bemoved in opposition to said controlling means by manipulation of theWork, and means tor limiting the'extent of movement ot said device underthe operation of said controlling1 means.

14. 1n a machine of the class described, a frame, and a channel openingfinger designed to turn the channel flapv aivay from the edge of thesole and mounted loosely on the frame and movable relatively thereto ineither oi' two directions transverse to each other-to accommodateitsel'lz to the shape ot the Work and the position ot the channelrelatively to the er ge ofthe work.

`15. Ina machine of the class described, means for 'operating on thebottom of a channel formed in the Work, and a channel opening device foropening the channel for operation of said means movable in either of twodirections to accommodate itself lto the character of the Work.

16. In a machine of the class described, a Sliding carrier, a channelopening device pivoted on the carrier and operative to Iturn the channelflap avvay from the edge of the sole, and means for yieldinglycontrolling said device.

17. In Va machine of the class-described, aV

sliding carrier, a. channel opening` device pivoted thereon, means :foryieldingly controlling said device, and adgustable means for linlitin;`the extent of movement oisaid device constructed and arranged to abutagainst said carrier.

1n a machine oi' the class described, a movaile carrier, yielding meansfor moving` said carrier in one direction, a channel opening devicepivoted in the carri and designed to litt the channel dan away trom theedge et the sole, and yieloin n moving` the operative endet said devicein a direction transverse to the direction of movement et the carrier.

19. in a machine of the class described, movable carrier, means forlimiting the eX- tent ot movement of the carV er, a channel openingdevice designed to litt the channel flap away from the edge of the soleand mounted loosely on the carrier for movement 1relatively tothecarrier, and means ior limiting the extent oi such movement ot thechannel opening device.

E20. ln a machine oi" the class described, a Work abutment, a carriermovable with `respect to the abutment, a. stud-shaft lined in saidcarrier.y and a channel opening device mounted or pivotal and slidingmovement on said stud-shaft.

21. .ln a machine of the class described, a carrier, a stud-shaft linedin said carrier, a channel opening device mounted for pivotal movementon said stud-shaft, a spring connected to the stud-shaft and channelopening device and operating,` to urge said device'yieldinply in thedirection of the Work, and means :tor securing` said stud in variouspositions et angular adjustment in said carrier to regulate the-tensionof said spring.

ln a machineot` the class described, fastening: insertin mechanismcomprisintx a 'reciprocating' member operative on-the bottom oii achannel 'formed in, the Work, a channel-oijien'nf, mounted adjacent tothe path ot movement o? sa l member, and means for urfino" saidv channelopening:

l Ward the `path ot movelinger yieldingly to ment ot said member.

ln a machine ot the class described, fastening in ort' r 'c cchanismcomprisinga an awl movable in idetcrmined path, a channel opening-`hlna'eismounted adjacent to said path, yieldinfz-means for maintainingsaid finger normally in a predetermined position relatively lto the pathof, movement or" said aivl constructed and arranfed to permit movementoi? the finger away rom the path of the and it struck by the aivl;

Q-i. in a machine of the class described, a- Y Work support, bottom ofa. channel :formed in the Work, a )fixed member, a universally tiltableWork abutment mounted on said member, and a means tor operating on thechannel opening device stationarily mounted relatively to said member.

25. In a machine of the class described, means for operating on thebottom of a channel formed in the Work, means for positioning the Workrelatively to said operating means having a surface to engage the edgeof the Work, and a channel opening device normally occupying a certainposition with respect to the Work positioning means l0 and movable bymanipulation of the Work in a. direction transverse to theWork-engaging' surface of the Work-positioning means.

In testimony whereof have signed my name to this specification.

FRED L. HACKENZIE.

